package service.Peer.page;

import java.awt.*;
import java.awt.event.*;
import java.io.*;

class OpenExplorer {
    private Frame f;
    private MenuBar bar;
    private Menu fileMenu, subMenu;
    private MenuItem closeItem, subItem1, subItem2;
    private MenuItem openItem, saveItem;

    //定义打开和保存对话框
    private FileDialog openDia, saveDia;

    //设置文本区域来保存打开的数据
    private TextArea ta;

    private File file;

    OpenExplorer() {
        init();
    }

    public void init() {
        f = new Frame("打开目录");
        f.setBounds(300, 100, 500, 600);
        //f.setLayout(new FlowLayout());

        bar = new MenuBar();

        ta = new TextArea();

        fileMenu = new Menu("文件");
        subMenu = new Menu("子菜单");

        openItem = new MenuItem("打开");
        saveItem = new MenuItem("保存");
        subItem1 = new MenuItem("子条目1");
        subItem2 = new MenuItem("子条目2");
        closeItem = new MenuItem("退出");

        subMenu.add(subItem1);
        subMenu.add(subItem2);


        fileMenu.add(openItem);
        fileMenu.add(saveItem);
        fileMenu.add(subMenu);
        fileMenu.add(closeItem);
        bar.add(fileMenu);

        f.setMenuBar(bar);

        //默认模式为 FileDialog.LOAD
        openDia = new FileDialog(f, "", FileDialog.LOAD);
        saveDia = new FileDialog(f, "我的保存", FileDialog.SAVE);

        f.add(ta);

        myEvent();

        f.setVisible(true);


    }

    private void myEvent() {
        saveItem.addActionListener(new ActionListener() {
            //设置保存文件的功能
            public void actionPerformed(ActionEvent e) {
                if (file == null)//文件不存在情况下 创建文件
                {
                    saveDia.setVisible(true);
                    String dirPath = saveDia.getDirectory();
                    String fileName = saveDia.getFile();

                    if (dirPath == null || fileName == null)
                        return;
                    file = new File(dirPath, fileName);
                }

                try {
                    BufferedWriter bufw = new BufferedWriter(new FileWriter(file));

                    String text = ta.getText();

                    bufw.write(text);

                    bufw.close();
                } catch (IOException ex) {
                    throw new RuntimeException("文件保存失败！");
                }
            }
        });

        openItem.addActionListener(new ActionListener() {
            //设置打开文件功能
            public void actionPerformed(ActionEvent e) {
                openDia.setVisible(true);
                String dirPath = openDia.getDirectory();//获取文件路径
                String fileName = openDia.getFile();//获取文件名称
                //System.out.println(dirPath +"++"+ fileName);

                //如果打开路径 或 目录为空 则返回空
                if (dirPath == null || fileName == null)
                    return;

                ta.setText("");//清空文本

                file = new File(dirPath, fileName);

                try {
                    BufferedReader bufr = new BufferedReader(new FileReader(file));

                    String line = null;

                    while ((line = bufr.readLine()) != null) {
                        ta.append(line + "\r\n");
                    }
                    bufr.close();
                } catch (IOException ex) {
                    throw new RuntimeException("文件读取失败！");
                }
            }
        });

        closeItem.addActionListener(new ActionListener() {
            //设置退出功能
            public void actionPerformed(ActionEvent e) {
                System.exit(0);
            }
        });

        f.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }

    public static void main(String[] args) {
        new OpenExplorer();
    }

    public void setVisible(boolean b) {
        // TODO Auto-generated method stub

    }


}